Multi-bolt Flange Loosening Test Machine with Compound Loading
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Solution Overview
Problem
Current bolt loosening test machines are inadequate for accurately simulating the complex load conditions of multi-bolt flange structures, as they primarily apply single load types and fail to accurately assess the anti-looseness properties of bolts under tension, bending, and torsion compound loading.
Innovation Solution
A multi-bolt loosening test machine comprising axial, transverse, and torque load transmission parts, which include a hydraulic puller, eccentric coupling, camshaft, U-type connecting rods, thrust ball bearings, and a servo motor to apply compound loading and measure loosening properties in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single load type test machines are used, then device complexity is reduced, but the ability to simulate real-world multi-bolt flange load conditions deteriorates
Solution Approach 1:
The test machine is divided into three independent load transmission parts: axial load transmission part, transverse load transmission part, and torque load transmission part. Each part independently applies one type of load (tension, bending, or torsion) to the flange, allowing complex compound loading to be achieved through combination of simple modular components rather than a single complex integrated system.
Solution Approach 2:
The test machine is designed with multi-functional capability to apply three different types of loads (axial tension, transverse bending, and torque torsion) simultaneously or independently on the same flange specimen. This universal loading capability allows a single test machine to replace multiple single-load machines while maintaining manageable complexity through standardized load application mechanisms.
2Measurement precision
If single bolt test configurations are used, then measurement precision for individual bolt loosening is improved, but the ability to assess multi-bolt interaction effects deteriorates
Solution Approach 1:
The test machine transitions from single-bolt testing to multi-bolt flange testing by adding the dimension of multiple bolt connections arranged in a flange pattern. This allows simultaneous testing of multiple bolts under compound loading conditions, capturing interaction effects between adjacent bolts while maintaining precise measurement capability through individual displacement sensors on each bolt.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The machine effectively isolates and applies compound loads without interference, enabling accurate assessment of anti-looseness properties of multi-bolt flanges under tension, bending, and torsion, simulating real-world load conditions and improving the analysis of bolt loosening.
Implementation Method 1
a hydraulic puller (27)
Implementation Method 2
an eccentric coupling (1)
Implementation Method 3
a camshaft (2)
Implementation Method 4
a thrust ball bearing (24)
Implementation Method 5
a servo motor (33)
Data Source
AI summary
The present invention provides a multi-bolt loosening test machine for flange with tension, bending and torsion compound loading. The multi-bolt loosening test machine for flange with tension, bending and torsion compound loading uses a transverse load generated by a three-phase asynchronous motor as a bending load applied to a flange, uses a tension force generated by a hydraulic puller as an axial tension load, and uses a torque generated by a servo motor as a torque load applied to the flange. The test machine is different from the current device that can apply two compound loads to a single bolt, and can apply three compound loads to the multi-bolt connection flanges. The present invention can isolate three compound loads from each other without interference, and display the applied loads in real time.